Hafasu Tiankeng formed when the ceiling of a cave above the Aouk Underground River collapsed. Later river found a new course – also under the ground – further to the north and Hafasu Tiankeng now is not traversed by the river anymore. Two passages lead to the Aouk Underground River from Hafasu Tiankeng – Wor’n Su towards the north-west and Bocca del Mostro (the monster’s mouth) – towards north-east.
Hafasu Tiankeng is some 800 m long and some 250 m wide, its walls are some 100 m high. Area of the sinkhole is approximately 142,000 m2, volume – approximately 12 – 15 million m3.
Its size exceeds 100 m and also the depth exceeds 100 m – thus this sinkhole can be considered to be a true tiankeng.
- Papua 2017 Aouk Underground River – Acheloos Geo Exploring, Petzl. Accessed in 14 January, 2019
- Andrea Benassi e Ivan Vicenzi, Papua 2017 Aouk Underground River – Acheloos Geo Exploring, cronache ipogee. Accessed in 16 January, 2019
- Il Tiankeng dell’Aouk, Speleologia Casolana. Accessed in 16 January, 2019
- Graham Mullan, News: Exploring Large River Caves in West Papua, Darkness Below. Accessed in 16 January, 2019
Hafasu Tiankeng on the map
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|Location, GPS coordinates:||0.9558 S 132.3303 E|
|Rating:||(3 / 5)|
|Where is located?||Asia, Indonesia, Western New Guinea, southern part of Tambrauw Regency, Aouk Underground River|
|Alternate name:||Hafasù Tiankeng|
|Depth:||approximately 100 m|
|Volume:||12 – 15 million m³|
Bit by bit, over thousands or even millions of years, water carves and shapes rock into designs only nature could create. Deep in limestone or under a few feet of hardened lava, on an ocean coast or a sandstone cliff, a cave is a mysterious and fascinating place.
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